Hot-air furnace.



N0: B9|,094. Patented Jan. l4, i902.

' H. W. BAKER.

HOT AIR FURNACE.

(Application filed Feb. 5, 1901. (No Model.) 2 Sheets$heet II.

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No. 69!,094. Patented Jan. l4, I902.

H. W. BAKER.

HOT AIR FURNACE.

(Application filed Feb. 5, 1001.

2 Sheets-Sheet 2.

(No Model.)

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HARRY \V. BAKER, OF OAKMONT, PENNSYLVANIA.

HOT AI R FU RNACE.

SPECIFICATION forming part of Letters Patent N0. 691 ,094, dated January 14, 1902. Application filed February 5, 1901. Serial No. 46,048. (No model.)

Toall whom it may concern.-

Be it known that I, HARRY WV. BAKER, a citizen of the United States of America, residing at Oakmont, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements in Hot-Air Furnaces, of which the followingis a specification, reference beinghad therein to the accompanying drawings.

This invention relates to certain new and useful improvementsin hot-air furnaces, and more particularly to that class used in dwellings and small buildings.

The invention contemplates constructing a furnace that may be easily built up, readily accessible to all its parts should the occasion require, and a construction that will be strong, durable, comparatively inexpensive to manufacture, and highly efiicient in its use.

A further object of the invention is to construct a furnace that will havea direct-draft which may be controlled by dampers or the like; and the invention broadly consists in the novel combination and arrangement of parts to be hereinafter more fully described, and specifically pointed out in the claims.

Indescribing the invention in detail refer- .ence is had to the accompanying drawings,

forming a part of this specification, and wherein like numerals of reference indicate corresponding parts throughout the several views, in which- Figure 1 is a side elevation of my improved furnace. Fig. 2 is a vertical sectional view thereof, taken on the line 2 2 of Fig. 1, looking in the direction of the arrow. Fig. 3 is a perspective view of one of the side walls of the combustion-chamber. Fig. lisa perspective view, partly broken away, of the rear or back wall of the combustion-chamber.

In the drawings the reference-numeral l indicates the ash-pit, having arranged thereon the grate-bars 2, the upper sides of the ashpit having formed therein grooves 3 for the reception of the outer casing 4 of the combustion-chamber, in which are secured the side,

walls 5, having arranged therein recesses 6, forming a series of fines. At the upper end of said dues are arranged openings 7, communicating with the combustion-chamber 8. The reference -numeral 9 represents the back wall of the combustion-chamber. The upper portion of the casingecarries a shoulder 9, having formed therein a recess 10 for the reception of the hood 11 of the furnace,

the latter being provided with an elbow 12,

leading to the flue 14, which extends into the smoke-chamber 15. This smoke-chamber is approXimatelyV-shaped and is secured in the inner face of the inclosing plate 16. Another inclosing plate 17 is arranged on the opposite side of the furnace, said plates being connected at their top by means of the rod 18 and held together by means of nuts 19, and at their bottom are likewise held together by the rod 20, carrying nuts 21. The smoke-chamber 15 beipg \l-shaped is constructed in a manner as to allow the flue 14 to enter the same centrally at its lower extremity. Two does 22 are secured in the smoke-chamber 15, which lead to a like smoke-chamber 23, arranged on the rear of the inclosing plate 17. These chambers are each provided with doors 23', arranged in the plates, and communicate with the chambers. These air-fines enter the smoke-chamber 23 at its sides, the flue 24 connecting with the said smoke-chamber 23 at its upperside, which flue leads to the chimney or stack.

The reference-numeral 25 represents the front and rear inclosing plates secured in a similar manner as the side plates.

The operation of my improved furnace is as follows: The smoke and dustfrom the ashpit will travel upwardly through the fines 6 and openings 7 into the combustion-chamber,

where the same will be consumed, the products of combustion passing up through the elbow 12, through the flue 14:, into the smokechamber 15, where it will be distributed, passing through the two lines 22 into the smokechamber 23 and thence into the flue 24, from where it will be conveyed to the chimney or stack, thus obtaining a larger radiation and a more equal distribution of the heat into the chamber formed by the inclosing plate surrounding the furnace than could otherwise be obtained. A series of hot-air pipes communicate with the inclosing plate and convey the hot air to the desired rooms or compartments.

It will be noted.that when the flues are to be cleaned the doors are opened. and. all the sediment, dust, and dirt may be easily removed.

It will be noted that various changes may be made in the details of construction with- ;out departing from the general spirit of my invention.

Having thus fully described my invention, what I claim as new, and desire to secure by 1o Letters Patent, is-

In a furnace, the combination of inclosing plates, an ash-pit, grate-bars secured at the upper end thereof, side walls in said combustion-chamber, a hood carried thereby, substantially V-shaped smoke-chambers secured to the inner faces of said plates, an elbow centrally connected to the hood directly over the combustion-chamber, a flue connected to said elbow and to one of said smoke-cham bers, a pair of flues connected to said smoke- ,charnber one on each side of said first-named flue and above said flue, the said pair of flues being connected to the other of said smokechambers, and a flue connected to said second-named smoke-chamber above said pair of flues, whereby the products of combustion are collected by the elbow and flue connected thereto, carried to the firstnamed smokechamber, are then conducted to the secondnamed smoke-chamber and thence to the flue communicating with the stack, substantially as described.

In testimony whereof I affix my signature in the presence of two witnesses.

. HARRY W. BAKER, Witnesses:

JOHN NoLAND, E. E. POTTER. 

